With so few people on the team, developer resources are precious. Instead of wasting time getting RawTherapee to look nice on below-average 2017 screen resolutions, we decided to agree to a minimum supported screen resolution and spend our time improving other things.

Having all panels expanded requires a screen width of (less than) 1440px.

If/when the color management options currently under the preview will go into a notebook tab on the left, issue #3054, then you will be able to shrink the window width even more without hiding anything.

I just fixe a big bug, present since some days (around gtk2 ==> gtk3). Compiler had not the same behavior, with some functions and system crash. The crash depended from the round position of center spot, and position of limits (left, right, top, bottom) of spot !. I think now it is fixed.

@Jdc,There is a bug related to the Control Points. Sometimes the Control Points position doesn't get saved to the PP3 or when you load them from the PP3 the Control Points don't show at the right locations. I'm not sure, but at times it seems like one Control Point affects the other (position). I need to do more testing.

I too would love to have gtk2 back or something as fast as gtk2. But I understand that with just a few developers it is challenging.

Maintaining gtk2 is a lot of work, as there are code incompatibilities (beyond the GUI) between the gtk3 / gtK2 versions. I spent more than a day to find out why, exactely the same code (in rtengine) worked perfectly in gtk2 and ended up crashing in gtk3.

I asked the question a few days ago to know what was done with the various versions (2 and 3), it was chosen the "dev" branch (which is gtk3).

It would take a real request for me to rebuild gtk2, probably about ten hours (or more) of work, to run (without bug or crash) in the 2 environments. But of course, if necessary I would do it

@dngimage It is important to specify which tool is used (color and light, denoise, etc.), I think that, if there is bug, it is a problem of dynamic refreshment

@dngimageMore, the pp3 do not contains the spot characteristics, it only contain the current spot (the last you used).

It is mip files which contains all positions, all settings.This mip files, is only update (dynamic) by improccoordinator.cc, But there are tools (eg Denoise) that only serves as dcrop.cc (I know it's programming !!)